JPA - Specification

Card Puncher Data Processing

JPA - Specification

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The Java Persistence API (JPA) provides a mechanism for managing persistence,. object-relational mapping and functions for the EJB 3.0 and later specifications.

The final documentation can be also download from this web site: persistence-2_0-final-spec.pdf




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JPA - Java Persistence API (JPA)

API The Java Persistence API is the Java API for the management of persistence and object/relational mapping for: Java EE and Java SE environments The Java Persistence consists of: The Java...
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JPA - Primary Key (@Id, @IdClass, )

Every JPA entity must have a primary key. A primary key corresponds to one or more fields or properties (“attributes”) of the entity class. A simple (i.e., non-composite) primary key must correspond...
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Persistence Unit

the node provider property See chapter 8.1 of the specification



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